/*************************************************************************/
/*  popup.cpp                                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "popup.h"
#include "os/keyboard.h"



void Popup::_gui_input(InputEvent p_event) {


}

void Popup::_notification(int p_what) {

	if (p_what==NOTIFICATION_VISIBILITY_CHANGED) {
		if (popped_up && !is_visible_in_tree()) {
			popped_up=false;
			notification(NOTIFICATION_POPUP_HIDE);
			emit_signal("popup_hide");
		}

		update_configuration_warning();
	}

	if (p_what==NOTIFICATION_ENTER_TREE) {
		//small helper to make editing of these easier in editor
#ifdef TOOLS_ENABLED
		if (get_tree()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_a_parent_of(this)) {
			set_as_toplevel(false);
		}
#endif
	}

}

void Popup::_fix_size() {


#if 0
	Point2 pos = get_pos();
	Size2 size = get_size();
	Point2 window_size = window==this ? get_parent_area_size()  :window->get_size();
#else

	Point2 pos = get_global_pos();
	Size2 size = get_size();
	Point2 window_size = get_viewport_rect().size;

#endif
	if (pos.x+size.width > window_size.width)
		pos.x=window_size.width-size.width;
	if (pos.x<0)
		pos.x=0;

	if (pos.y+size.height > window_size.height)
		pos.y=window_size.height-size.height;
	if (pos.y<0)
		pos.y=0;
#if 0
	if (pos!=get_pos())
		set_pos(pos);
#else
	if (pos!=get_pos())
		set_global_pos(pos);

#endif

}


void Popup::set_as_minsize() {

	Size2 total_minsize;

	for(int i=0;i<get_child_count();i++) {

		Control *c=get_child(i)->cast_to<Control>();
		if (!c)
			continue;
		if (!c->is_visible())
			continue;

		Size2 minsize = c->get_combined_minimum_size();

		for(int j=0;j<2;j++) {

			Margin m_beg = Margin(0+j);
			Margin m_end = Margin(2+j);

			float margin_begin = c->get_margin(m_beg);
			float margin_end = c->get_margin(m_end);
			AnchorType anchor_begin = c->get_anchor(m_beg);
			AnchorType anchor_end = c->get_anchor(m_end);

			if (anchor_begin == ANCHOR_BEGIN)
				minsize[j]+=margin_begin;
			if (anchor_end == ANCHOR_END)
				minsize[j]+=margin_end;

		}

		total_minsize.width = MAX( total_minsize.width, minsize.width );
		total_minsize.height = MAX( total_minsize.height, minsize.height );
	}

	set_size(total_minsize);

}


void Popup::popup_centered_minsize(const Size2& p_minsize) {


	Size2 total_minsize=p_minsize;

	for(int i=0;i<get_child_count();i++) {

		Control *c=get_child(i)->cast_to<Control>();
		if (!c)
			continue;
		if (!c->is_visible())
			continue;

		Size2 minsize = c->get_combined_minimum_size();

		for(int j=0;j<2;j++) {

			Margin m_beg = Margin(0+j);
			Margin m_end = Margin(2+j);

			float margin_begin = c->get_margin(m_beg);
			float margin_end = c->get_margin(m_end);
			AnchorType anchor_begin = c->get_anchor(m_beg);
			AnchorType anchor_end = c->get_anchor(m_end);

			if (anchor_begin == ANCHOR_BEGIN)
				minsize[j]+=margin_begin;
			if (anchor_end == ANCHOR_END)
				minsize[j]+=margin_end;

		}

		total_minsize.width = MAX( total_minsize.width, minsize.width );
		total_minsize.height = MAX( total_minsize.height, minsize.height );
	}


	popup_centered( total_minsize );
	popped_up=true;

}

void Popup::popup_centered(const Size2& p_size) {

	Point2 window_size = get_viewport_rect().size;

	emit_signal("about_to_show");
	Rect2 rect;
	rect.size = p_size==Size2()?get_size():p_size;

	rect.pos = ((window_size-rect.size)/2.0).floor();
	set_pos( rect.pos );
	set_size( rect.size );

	show_modal(exclusive);
	_fix_size();

	Control *focusable = find_next_valid_focus();
	if (focusable)
		focusable->grab_focus();

	_post_popup();
	notification(NOTIFICATION_POST_POPUP);
	popped_up=true;
}

void Popup::popup_centered_ratio(float p_screen_ratio) {



	emit_signal("about_to_show");

	Rect2 rect;
	Point2 window_size = get_viewport_rect().size;
	rect.size = (window_size * p_screen_ratio).floor();
	rect.pos = ((window_size-rect.size)/2.0).floor();
	set_pos( rect.pos );
	set_size( rect.size );

	show_modal(exclusive);
	_fix_size();

	Control *focusable = find_next_valid_focus();
	if (focusable)
		focusable->grab_focus();

	_post_popup();
	notification(NOTIFICATION_POST_POPUP);
	popped_up=true;

}

void Popup::popup() {

	emit_signal("about_to_show");
	show_modal(exclusive);


	_fix_size();

	Control *focusable = find_next_valid_focus();

	if (focusable)
		focusable->grab_focus();

	_post_popup();
	notification(NOTIFICATION_POST_POPUP);
	popped_up=true;
}

void Popup::set_exclusive(bool p_exclusive) {

	exclusive=p_exclusive;
}

bool Popup::is_exclusive() const  {

	return exclusive;
}


void Popup::_bind_methods() {

	ClassDB::bind_method(D_METHOD("popup_centered","size"),&Popup::popup_centered,DEFVAL(Size2()));
	ClassDB::bind_method(D_METHOD("popup_centered_ratio","ratio"),&Popup::popup_centered_ratio,DEFVAL(0.75));
	ClassDB::bind_method(D_METHOD("popup_centered_minsize","minsize"),&Popup::popup_centered_minsize,DEFVAL(Size2()));
	ClassDB::bind_method(D_METHOD("popup"),&Popup::popup);
	ClassDB::bind_method(D_METHOD("set_exclusive","enable"),&Popup::set_exclusive);
	ClassDB::bind_method(D_METHOD("is_exclusive"),&Popup::is_exclusive);
	ADD_SIGNAL( MethodInfo("about_to_show") );
	ADD_SIGNAL( MethodInfo("popup_hide") );
	ADD_GROUP("Popup","popup_");
	ADD_PROPERTY( PropertyInfo( Variant::BOOL, "popup_exclusive"), "set_exclusive","is_exclusive") ;
	BIND_CONSTANT(NOTIFICATION_POST_POPUP);
	BIND_CONSTANT(NOTIFICATION_POPUP_HIDE);


}

Popup::Popup() {

	set_as_toplevel(true);
	exclusive=false;
	popped_up=false;
	hide();
}

String Popup::get_configuration_warning() const {

	if (is_visible_in_tree()) {
		return TTR("Popups will hide by default unless you call popup() or any of the popup*() functions. Making them visible for editing is fine though, but they will hide upon running.");
	}

	return String();
}

Popup::~Popup()
{

}

void PopupPanel::set_child_rect(Control *p_child) {
	ERR_FAIL_NULL(p_child);

	Ref<StyleBox> p = get_stylebox("panel");
	p_child->set_area_as_parent_rect();
	for(int i=0;i<4;i++) {
		p_child->set_margin(Margin(i),p->get_margin(Margin(i)));
	}
}

void PopupPanel::_notification(int p_what) {


	if (p_what==NOTIFICATION_DRAW) {

		get_stylebox("panel")->draw(get_canvas_item(),Rect2(Point2(),get_size()));
	}
}

PopupPanel::PopupPanel() {


}